CVE-2026-8186

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 58% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability was detected in Open5GS up to 2.7.7. This affects the function ogs_sbi_client_send_via_scp_or_sepp in the library lib/sbi/client.c of the component NF. Performing a manipulation results in out-of-bounds read. The attack is possible to be carried out remotely. The patch is named d5bc487fcf9ea87d2b03f2ef95123af344773bfb. It is suggested to install a patch to address this issue.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

May 9, 2026

Last Modified

July 24, 2026

Advisory Details (4)

Auto-updated May 9, 2026
No patch confirmed yet.
generic

sbi: prevent NF crash on callback URI without path component by Noahs212 · Pull Request #4496 · open5gs/open5gs · GitHub

https://github.com/open5gs/open5gs/pull/4496
generic

[Bug]: UPF (open5gs-upfd) SIGSEGV (exit 139) under crafted GTP-U traffic on UDP/2152 · Issue #4491 · open5gs/open5gs · GitHub

https://github.com/open5gs/open5gs/issues/4491
generic

sbi: prevent NF crash on callback URI without path component · open5gs/open5gs@d5bc487 · GitHub

https://github.com/open5gs/open5gs/commit/d5bc487fcf9ea87d2b03f2ef95123af344773bfb
generic

GitHub - open5gs/open5gs: Open5GS is a C-language Open Source implementation for 5G Core and EPC, i.e. the core network of LTE/NR network (Release-17) · GitHub

https://github.com/open5gs/open5gs/

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 33× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 186 total refreshes for this CVE.

  1. 2026-09-15 03:12 UTCEPSS rescore
  2. 2026-09-13 16:48 UTCEPSS rescore
  3. 2026-09-12 15:02 UTCEPSS rescore
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-11 12:53 UTCOSV refresh
  6. 2026-09-08 22:01 UTCEPSS rescore
  7. 2026-09-06 13:48 UTCEPSS rescore
  8. 2026-09-05 15:31 UTCEPSS rescore
  9. 2026-09-04 05:07 UTCEPSS rescore
  10. 2026-09-02 14:12 UTCEPSS rescore
  11. 2026-09-01 13:54 UTCEPSS rescore
  12. 2026-09-01 04:40 UTCEPSS rescore
  13. 2026-08-30 19:18 UTCEPSS rescore
  14. 2026-08-30 19:17 UTCEPSS rescore
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-28 21:42 UTCEPSS rescore
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 14:47 UTCEPSS rescore
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-24 14:18 UTCEPSS rescore
  21. 2026-08-23 18:50 UTCEG score recompute
  22. 2026-08-23 18:50 UTCGHSA enrichment
  23. 2026-08-23 00:19 UTCEPSS rescore
  24. 2026-08-21 23:49 UTCEPSS rescore
  25. 2026-08-20 22:56 UTCEPSS rescore
Show 75 more
  1. 2026-08-19 17:04 UTCEPSS rescore
  2. 2026-08-18 13:49 UTCEPSS rescore
  3. 2026-08-18 13:49 UTCEPSS rescore
  4. 2026-08-17 13:47 UTCEPSS rescore
  5. 2026-08-17 11:27 UTCEG score recompute
  6. 2026-08-17 11:27 UTCGHSA enrichment
  7. 2026-08-16 14:56 UTCEPSS rescore
  8. 2026-08-16 14:56 UTCEPSS rescore
  9. 2026-08-16 04:31 UTCEG score recompute
  10. 2026-08-16 04:31 UTCGHSA enrichment
  11. 2026-08-16 02:15 UTCEPSS rescore
  12. 2026-08-15 02:30 UTCEG score recompute
  13. 2026-08-15 02:30 UTCGHSA enrichment
  14. 2026-08-15 01:31 UTCEPSS rescore
  15. 2026-08-14 14:48 UTCGHSA enrichment
  16. 2026-08-14 03:05 UTCEG score recompute
  17. 2026-08-14 03:05 UTCGHSA enrichment
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-13 04:23 UTCGHSA enrichment
  20. 2026-08-12 16:41 UTCEG score recompute
  21. 2026-08-12 16:41 UTCGHSA enrichment
  22. 2026-08-12 13:51 UTCEPSS rescore
  23. 2026-08-11 15:49 UTCEG score recompute
  24. 2026-08-11 15:49 UTCGHSA enrichment
  25. 2026-08-11 13:43 UTCEPSS rescore
  26. 2026-08-11 01:23 UTCEG score recompute
  27. 2026-08-11 01:23 UTCGHSA enrichment
  28. 2026-08-11 00:00 UTCEPSS rescore
  29. 2026-08-10 13:39 UTCGHSA enrichment
  30. 2026-08-10 01:46 UTCGHSA enrichment
  31. 2026-08-09 14:03 UTCEG score recompute
  32. 2026-08-09 14:03 UTCGHSA enrichment
  33. 2026-08-09 13:47 UTCEPSS rescore
  34. 2026-08-09 02:20 UTCEG score recompute
  35. 2026-08-09 02:20 UTCGHSA enrichment
  36. 2026-08-08 16:37 UTCEPSS rescore
  37. 2026-08-08 12:49 UTCGHSA enrichment
  38. 2026-08-08 01:06 UTCEG score recompute
  39. 2026-08-08 01:06 UTCGHSA enrichment
  40. 2026-08-07 13:23 UTCGHSA enrichment
  41. 2026-08-07 01:41 UTCEG score recompute
  42. 2026-08-07 01:41 UTCGHSA enrichment
  43. 2026-08-06 13:47 UTCEPSS rescore
  44. 2026-08-06 10:08 UTCGHSA enrichment
  45. 2026-08-05 22:05 UTCEG score recompute
  46. 2026-08-05 22:05 UTCGHSA enrichment
  47. 2026-08-05 19:17 UTCEPSS rescore
  48. 2026-08-05 19:17 UTCEPSS rescore
  49. 2026-08-04 15:10 UTCEPSS rescore
  50. 2026-08-04 10:39 UTCEPSS rescore
  51. 2026-08-03 19:28 UTCEG score recompute
  52. 2026-08-03 19:28 UTCGHSA enrichment
  53. 2026-08-03 10:36 UTCEPSS rescore
  54. 2026-08-03 02:04 UTCGHSA enrichment
  55. 2026-08-02 14:21 UTCGHSA enrichment
  56. 2026-08-02 02:38 UTCEG score recompute
  57. 2026-08-02 02:38 UTCGHSA enrichment
  58. 2026-08-02 02:27 UTCEPSS rescore
  59. 2026-08-01 04:16 UTCEPSS rescore
  60. 2026-07-30 16:28 UTCEPSS rescore
  61. 2026-07-30 01:30 UTCEPSS rescore
  62. 2026-07-28 15:37 UTCEPSS rescore
  63. 2026-07-27 14:14 UTCEPSS rescore
  64. 2026-07-26 14:54 UTCEPSS rescore
  65. 2026-07-26 08:25 UTCEG score recompute▲ 2.20
  66. 2026-07-26 08:25 UTCGHSA enrichment
  67. 2026-07-25 14:18 UTCEPSS rescore
  68. 2026-07-24 14:18 UTCEPSS rescore
  69. 2026-07-24 08:11 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  70. 2026-07-23 14:18 UTCEPSS rescore
  71. 2026-07-23 03:23 UTCEG score recompute
  72. 2026-07-22 14:08 UTCEPSS rescore
  73. 2026-07-21 15:25 UTCEPSS rescore
  74. 2026-07-21 15:25 UTCEPSS rescore
  75. 2026-07-20 17:08 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-8186?
CVE-2026-8186 is a high vulnerability published on May 9, 2026. A vulnerability was detected in Open5GS up to 2.7.7. This affects the function ogssbiclientsendviascpor_sepp in the library lib/sbi/client.c of the component NF. Performing a manipulation results in out-of-bounds read. The attack is possible to be carried out remotely. The patch is named…
When was CVE-2026-8186 disclosed?
CVE-2026-8186 was first published in the National Vulnerability Database on May 9, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8186 actively exploited?
CVE-2026-8186 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 57.4% of all scored CVEs.
What is the CVSS score of CVE-2026-8186?
CVE-2026-8186 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-8186?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8186, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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